Dell EMC Isilon Solutions and Design Specialist for Technology Architects E20-555 Exam Practice Test

A four-node Isilon cluster is being used in a Hadoop workflow with a parity protection of N+2:1. The HDFS protocol has been enabled and is being used to access data.

How many additional copies of data are written into the Isilon cluster using HDFS?

An Isilon customer has an environment supporting a wide range of different workloads. They want to assign clients to performance tiers based on the resources needed.

What can the customer use to meet this requirement?

In an Isilon cluster for N+2 protection, what is the minimum number of nodes?

A customer has a 7-node Isilon cluster configured with N+2:1 protection. How many nodes can be offline with the data accessible and fully writeable?

Your customer manages a print media environment, consisting of three Isilon clusters, which are out of support. The customer would like to have access to new software releases and feature sets. You have been asked to perform a full discovery of the customer's environment.

The customer's current Isilon clusters are as follows:

''Cust'' (12 x 12000X) serves as upload media storage for different tenants.

''Working'' (8 x 12000X + 6 x X200) serves as a working zone for extraction to RAW and printing media from it.

''Archive'' (16 x 72NL + Accelerator nodes) is used to store printed content for six months.

The customer operates in a Windows environment using SMB 2.0, two DNS servers per AD forest, three forest domains which are servicing three different environments. All servers are operating on a 1Gb network, three VLANs segregating the DEV/QA/PROD environments. Currently, there is no monitoring in place for performance measurement or optimization.

The requirements for this solution include:

* Better ROI and TCO

* Maintain same performance with possible improvements

* Renew HW/SW and get inclusive support

* Limit migrations

* Reduce space, power, cooling consumption

* Get new feature sets

* If migration required, use Parallel copy (multiple nodes, multiple threads, multiple connections)

* Segregate tenant shares from other tenants

* Expand up to 1PB of total storage

What would you recommend be done to consolidate the three clusters into one?

While validating the value (VTV) with a large educational customer, they have decided they would like to add a Disaster Recovery (DR) site to their existing Isilon environment. The existing cluster contains six X-Series nodes. They plan to have all workflows replicated to the DR site and both clusters will have identical shares, exports, and user authentication. The customer would like to test DR failover every six months by running their production environment from the DR site.

What would you recommend for the DR solution?

A customer environment is used for analytics on very large datasets. They are interested in using Isilon storage and Hadoop but are concerned about the costs.

How does Isilon change the scalability of a Hadoop environment?